Strong __________ can be very dangerous for swimmers.
A.flows | B.columns |
C.floods | D.currents |
Great changes _________ in many fields since China was open to the whole world.
A.have taken place | B.took place |
C.have been taken place | D.were taking place |
_____you’ve made a promise, you are expected to carry it out.
A.While | B.Unless |
C.Once | D.Though |
His parents insisted that he __________English well when he was in junior school.
A.would learn | B.must learn |
C.learned | D.learn |
I don’t like this new model of App6 +; _________I had enough money, I wouldn’t buy it.
A.only if | B.even if |
C.as if | D.if only |
Your speech was heard by a group of five judges, _______ agreed that it was the best one this year.
A.all of whom | B.all of who |
C.all of them | D.all of those |