So far our company __________________exceptional lawn services to residential and commercial customers for 20 years.(2019年12月第22题)
A. will provide
B. had provided
C. provided
D. has provided
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Not until I got to the airport _______________ that my passport was missing.(2019年12月第24题)
A. had I realized
B. will I realize
C. I will realize
D. I had realized
If I _____________his email address, I would have sent him a message yesterday.(2019年12月第26题)
A. have known
B. had known
C. will know
D. know
John spent a lot of time ____________to his colleagues how challenging the priject was.(2019年12月第29题)
A. explain
B. explaining
C. to explain
D. explained
If you have dimeulty_____________ your bills, tell your utility company as soon as possible.
A. pay
B. paid
C. to pay
D. paying