在钻进过程中，钻机（）严禁站人，以免钻杆伤人。
A.后面
B.前面
C.下面
D.周围
参考答案：A
—I don't imagine Russ and his poor dog had a good time on
the deserted island，________？
—I have no idea.
A．didn't they
B．do you
C．did they
D．hadn't they
John received an invitation to dinner, and with his work ________, he gladly accepted it.
A．finished
B．finishing
C．having finished
D．was finished
