—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
_______ to sunlight for too much time will do harm to one’s skin, so you should make it a rule to get your skin creamed before going out in summer.
A. Exposed B. Having exposed C. Being exposed D. To expose
Nowadays it seems to some of us that it is feeling, not just money, that is what really ________.
A. counts B. stays C. means D. grows
The money collected should be made good use __________ the people who suffered a lot in the terrible flood in Beijing on the night of July 21, 2012, which caused great losses．
A．of helping B．to help C．of to help D．to helping
I am sorry you’ve been waiting so long, but it will still be some time __________ Brain gets back from his holiday.
A．since B．before C．till D．after
— 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 is it that B．how it is that C．why it is that D．how is it that
