给下列句子选择正确的答语。
（ ）What are you doing? A. Yes, they are.
（ ）Is her birthday in June? B. It's May the 5th.
（ ）What's the date? C. I'm answering the phone.
（ ）What do you do on the weekend? D. Yes, it is.
（ ）Are they doing an experiment? E. I often go hiking.
( )_______ at a red light.
A. GoB. Stop and waitC. Slow down and stop
( )If you are ______, you should see a doctor.
A. illB. coldC. angry
( )My mother likes ______.
A. singing and dancing.B. sing and danceC. sing and dancing
( )I'm going ______ 3 o'clock.
A. onB. inC. at
( )_______ does he work? He works at sea.
A. HowB. WhoC. Where