Many people worry that air pollution might changes in the weather around the world.
| A．add to | B．lead to | C．turn to | D．belong to |
---Your suitcase seems very heavy. Need any help?
----__________.
| A．That all depends! |
| B．No, thanks. I can manage it myself. |
| C．It’s a pleasure. |
| D．It couldn’t be better. Thank you all the same. |
If something such as a product, an activity, or someone’s career______, it suddenly becomes very successful.
| A．takes up | B．takes in | C．takes off | D．takes away |
---______ made her ashamed of herself?
---________ the lowest mark in her class.
| A．What; Because she got |
| B．Was it what; Getting |
| C．What was it that; She got |
| D．What was it that; Getting. |
This software______ protect computers from being attacked by viruses and it took my brother a long time to ______ how to start it.
| A．is intended for; come out |
| B．intends to ; turn out |
| C．is mean to; figure out |
| D．is meant for; work out |
Never should we forget the war and sufferings _________ caused to the people.
| A．it. | B．which | C．that | D．what |