题目内容

So far our company____exceptional lawn services to residential and commercial customers for 20 years.

A. will provide
B. had provided
C. provided
D. has provided

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____you want some samples of our new products, you might contact our sales manager.

A. If
B. While
C. Until
D. Although

Not until I got to the airport____ that my passport was missing.

A. had I realized
B. will I realize
C. I will realize
D. I had realized

As a salesperon,____John lacks is self-confidence when he is talking with clients.

A. which
B. what
C. why
D. that

If I____his email address,I would have sent him a message yesterday.

A. have known
B. had known
C. will know
D. know

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