1 . Spending a few hours learning about the history and culture of the destination will help tourists understand      they're seeing

A．what	B．where
C．that	D．why

2 . —Be careful not to drop the Ming Dynasty vase.
—Yes, we can’t be ________.

A．too careful	B．very careful
C．too careless	D．careless enough

3 . He was about to tell me the secret ______ someone patted him on the shoulder.

A．as

B．until

C．when

D．while

4 . When ______ help, one often says “Thank you.” or “It’s kind of you.”

A．offering

B．to offer

C．to be offered

D．offered

5 . —Who should be responsible for the accident?
—The boss, not the workers.They just carried out the order ________.

A．as told

B．as are told

C．as telling

D．as they told

6 . For more information about Cambridge, ________ our website at www. cambridge. org.

A．visit

B．visiting

C．to visit

D．visited

7 . My mother is always warning me when I go out, “Don’t get off the bus ____it is stopping.”

A．until

B．before

C．while

D．after

8 . It wasn’t until nearly a month later ________ I received the manager’s reply.

A．since

B．when

C．as

D．that

9 . The computer was used in teaching. As a result, not only _____, but students became more interested in the lessons.

A．saved was teachers’ energy

B．was teachers’ energy saved

C．teachers’ energy was saved

D．was saved teachers’ energy

10 . Before the sales start, I make a list of _______ my kids will need for the coming season.

A．why

B．what

C．how

D．which