题目内容

In summer, food goes bad easily _____ it is put in the refrigerator.

A. until
B. if
C. since
D. unless

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The teacher always tells his students to keep ______ from day one.

A. in
B. on
C. up
D. with

A ______ is helpful in looking for a job, but it doesn’t mean a job.

A. certificate
B. record
C. license
D. grade

Living at college gives me a sense of responsibility. What is the pattern of the sentence?

A. SPOA
B. SPOO
C. SPOC
D. SPO

I'll let you know ___________ he comes back.

A. before
B. because
C. as soon as
D. although