单项选择题

I didn’t answer the phone ______ I didn’t hear it ring.

A. if
B. unless
C. although
D. because
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单项选择题
A. Warm. B. Cold. C. Hot. D. Wet.
A. Warm. B. Cold.
C. Hot. D. Wet.
单项选择题
A. Yes, I am. B. Yes, I do.C. I’m sorry. D. It’s my pleasure.
A. Yes, I am.
B. Yes, I do.
C. I’m sorry.
D. It’s my pleasure.
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