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对钟控触发器而言，时钟脉冲确定触发器状态何时转换，输入信号确定触发器状态如何转换。
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Directions: select a suitable word for each blank from the word bank.
Directions： Complete each sentence with a suitable preposition or adverb.1)Many people savemoney for a long time so they can travel someplace exciting on holidays.2) George will soon see how many things will make demandshis time since he's going back to school in the fall while still working full time.3) I told my six-year-old daughter to sing her heartat the performance tonight.4) In order to getin this career, you need to make all the right contacts.5) "I'm kindscared," Lucy told me. "Can you hold my hand?"6) Many people think my job is easy;the contrary, it's very difficult!7)times, Jerry wondered why he decided to spend the summer in India.8) The politician and his wife stood sideside as he announced his resignation.9) He was cutfrom all his friends when he studied abroad.10) Just how do you expect to carrythis crazy plan?
Directions： Read the following passage, and select a suitable word for each blank from the word bank. Write down the corresponding words for each item in the blank. Each word can be used only once.Every year, thousands of students choose to escape the insulated1)of university life and study abroad. There are almost as many reasons for studying abroad as there are students. Some want to2)their CVs and increase their chances of employment after graduation. Some want to volunteer and help the3)people who live in poorer countries. Some want to learn a skill, so they attend specialized programs, like4)field schools where they can participate in digs. Still others want to learn a language so they choose to live in a country where that language is spoken.These are all5)valid reasons for wanting to study abroad. Interestingly, students who only want the experience for their CVs will6)choose programs that are closer to home and less challenging. They aren't fully invested in the program and, unfortunately, the work these students perform often goes7)by the community in which they live and work.On the other hand, students who want more than just the experience — those who truly want to help people and do good — often find and choose programs that are well8)to their interests, despite their location and challenge. The work these students perform also9)results in considerable good for their respective communities. Research has shown that, for students in this latter group, choosing an appropriate study-abroad program is a strong 10)of future success in life.
Directions： Choose thbest word to complete each sentence.Do we have the ____ of coming to work on Friday or is it mandatory?
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