—It rained cats and dogs this morning. I'm glad we took an umbrella.
—Yeah, we would have got wet all over if we ________.
A．hadn't B．haven't C．didn't D．don't
—Your colleague is speaking English with fluency.
—It's no wonder．She ____ in the UK for a year as a visiting professor
A. worked B. has worked
C. had worked D. has been working
The government must be very _____ about setting policies and make no decision until they are quite sure it is the right one.
A. particular B. concerned C. cautious D. certain
She says that she'll have to close the shop ________ business improves.
A. if B. unless C. after D. when
While ______ himself in the newspaper in a cafe , he got his pocket picked.
A．having buried B．buried
C．burying D．to be buried
— Can you explain ____ you have been late for school several times this term?
— Sorry, but it is the first time that I have been late this week.
A.why it is that B．how it is that
C．why is it that D．how is it that
