题目内容

It is a little difficult for me to____the problem.

A. answer
B. answering
C. answered
D. answers

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Qian Xuesen devoted all his life to______scientific research.

A. do
B. doing
C. did
D. does

He told his students to be careful next time. 其中to be careful做什么成分？

A. 宾语
B. 宾语补足语
C. 间接宾语
D. 直接宾语

独立是高中和大学重要的区别。 is the major between high school and .

参加学生俱乐部是提沟通技巧,交朋友和享受你的爱好的好方法。 student clubs is a good way to communication skills, to and enjoy your hobbies.