No one knew where my grandfather was, and many came to _____us in searching for him.
| A．help | B．assist | C．provide | D．encourage |
. Lion: Want to have a fight, little dog?
Dog: No. I don’t want to fight an animal that is ______extinction(灭绝). My master told me that we should protect endangered animals.
| A．on the edge of | B．in the way to | C．about to | D．due to |
Stanford opened its doors in 1891 and more than a century later, it remains _____finding solutions to the great challenges of the day and to _______ its students for leadership in today’s complex world.
| A．devoted, prepare | B．dedicated to, preparing |
| C．dedicating, prepare | D．devoting to, preparing |
I didn’t quite follow him because he explained the theory _____that is too abstract for me.
| A．out of the way | B．on the way | C．in a way | D．by the way |
The public transport system in Beijing is very good now, so there _____be any difficulty in traveling around the city.
| A．couldn’t | B．mustn’t | C．needn’t | D．shouldn’t |
----In recent years, _____problem of global warming has become very serious.
----That’s right. People are facing _____diversity of natural disasters now.
| A．/, a | B．a, the | C．the, a | D．a, a |