Helen________her keys in the office so she had to wait until her husband________home．
A．has left；comes
B．left；had come
C．had left；came
D．had left；would come
The pen I________I________is on my desk．
A．think；lost
B．thought；had lost
C．think；had lost
D．thought；have lost
________got into the room________the telephone rang．
A．He hardly had；then
B．Hardly had he；when
C．He had not；that
D．Not had he；when
Tom was disappointed because most of the guests________when he________at the party．
A．left；had arrived
B．left；arrived
C．had left；had arrived
D．had left；arrived
—Why did you miss the English class?
—Because my alarm clock didn’t________．
A．go off
B．put off
C．take off
D．fall off
—Why are you late again?
—I overslept，and________I got to the bus stop，the bus had left．
A．after
B．while
C．by the time
D．at time
