What do you ______ on the weekend?
A. doing
B. do
C. /
答案:B
Let's _____ a basketball match tonight. [ ]
A. see
B. read
C. watch
D. look
蒸发量大于( )t/h的锅炉,至少装设两个安全阀。
A.0.5
B.1.0
C.2
D.4