According to research, children whose parents __________ are more likely to have difficulty __________ their studies.
| A．split up ； concentrating on |
| B．broke into ；to focus on |
| C．gave up ；concentration on |
| D．put into ； focusing on |
Energy is ____makes thing work..
| A．what | B．something | C．anything | D．that |
The manager came over and asked the customer how____
| A．did the quarrel came about | B．the quarrel had come about |
| C．had the quarrel come about | D．had the quarrel come about |
____he does has nothing to do with me.
| A．whatever | B．No matter what | C．That | D．If |
This is the house _________ the great man Mao Zedong was born 110 years ago.
| A．why | B．that | C．about which | D．in which |
Then arose the question _________ we were to get so much money.
| A．where | B．that | C．about which | D．in which |