1.Mary had to wait outside her house for her husband’s return because she ___ her key in the office.

1.Mary had to wait outside her house for her husband’s return because she ___ her key in the office.
A.has left B.leaves C.had left D.left
2.English is more extensively used now than any other language _____.
A.ever was B.had ever been C.ever is D.has ever been
3.Walter offered us a lift when he was leaving the office,but we declined the offer,for our work ___ .
A.was not finished B.did not finish C.has not been finished D.had not been finished
4.I haven’t met him for ages,but his mother ___ him sometimes.
A.had still seen B.still sees C.has still seen D.still saw
5.We shall have completed the work by the time he ____ back next week.
A.will come B.comes C.is coming D.will have come
6.Do you often swim now?No,but I ____ when I was in my fifties.
A.used to B.am used to it C.used to do D.was used to doing
7．The job______ by the time he comes back.
A.will have been done B.will have done C.is being done D.has been done