The novel was completed in 1978， the economic system has seen great changes．
| A．when | B．during which | C．since then | D．since when |
Jane is an honest girl；I say it，________I don't like her.
| A．even though | B．as if |
| C．as long as | D．as though |
Six people were killed in the riot(暴乱)，a policeman________.
| A．include | B．included |
| C．including | D．to be included |
He tried his best to solve the problem，________difficult it was.
| A．however | B．no matter |
| C．whatever | D．Although |
On the bus I saw a studentI thought was your brother.
| A．who | B．whom |
| C．whose | D．He |
— Guess what? I went to Hainan Island last weekend.
— Really? You a wonderful time.
| A．must have had | B．should have had |
| C．can have had | D．might have had |