—________ Simon and Amy like drawing?
—Yes, I think so. [ ]
A. Do
B. Does
C. Is
D.Are
答案:A
Mr Zhang left for America in 1998, and he didn't return home 2002. [ ]
A. unless
B. when
C. until
D. since
如何进行沸点仪在开始加热和温度接近沸点时的操作?