1¡¢—Hello, I__________(phone) to ask if I can book two tickets for tonight’s film.

—Sorry, we’ve already sold out.

2¡¢Jack __________(work)in the lab when the power cut occurred.

3¡¢At college,Barack Obama didn’t know that he__________ (become) the first black president of the United States of America.

4¡¢Please don’t give me a call between 9:00 and 11:00 tomorrow. I __________(have) a meeting then.

5¡¢Attracted by the unique way of communicating, many foreigners __________(join) in sending and grabbing red packets so far.

6¡¢During his stay in Xi’an, Jerry tried almost all the local foods his friends        (recommend).

7¡¢The woman from Jiangsu Province, __________(make) shoes since she was 19 years old, and this year marks her 31st year making cloth shoes.