Which of the following options is a present simple sentence?
A. I eat rice every day.
B. I am eating rice at the moment.
C. I have eaten rice twice today.
D. I have been eating rice since you arrived.
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Which of the following options uses the present perfect question form?
Are you going to Germany this year?
B. Do you visit Germany regularly?
C. How long have you been living in Germany?
D. Have you ever been to Germany?
Which of the following options uses the present continuous negative form?
A. You don’t look very happy.
B. You haven’t looked so beautiful in years.
C. You are looking tired.
D. You aren’t looking very well.
Which of the following sentences does NOT use a present tense?
A. I will see you in the morning.
B. Unemployment is rising.
C. I play tennis every Friday morning.
D. She has never been married.
最常见的白内障类型为()
A. 年龄相关性白内障
B. 并发性白内障
C. 先天性白内障
D. 后发性白内障