By the 1920s, Howard Carter ____ an explorer.
#99036
A
has become
B
had become
C
became
D
would become
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—Do you still remember the first time you _______with a girl? —Not exactly, but I remember it was a Sunday.
#103124
A
talked
B
had talked
C
have talked
D
were talking
All the task __________ ahead of time, so they decided to go on holiday for a week.
#102577
A
having finished
B
had finished
C
having been finished
D
had been finished
It’s very dangerous to _______ these viruses without any protection.
#99965
A
be exposed to
B
expose to
C
expose
D
be exposing to
The old man __________ in Tibet for two years as a volunteer teacher；it is an experience he often mentions.
#101367
A
served
B
serves
C
is serving
D
has served
—Mr. Hu, have you finished correcting the papers?—Not yet, the papers _______. You _______ get the results from me by tomorrow.
#100574
A
are corrected; will
B
are being correcting; should
C
are being corrected; shall
D
are being corrected; would