——Tom is never late for work. Why is he absent today?
—— Something _____to him.
| A．must have happened | B．can have happened |
| C．must happen | D．can happen |
Everyone has periods in their lives everything seems very hard.
| A．which | B．where | C．that | D．when |
—Do you know Lily has gone to London?
—Oh，________I haven't seen her these days.
| A．no doubt | B．no wonder |
| C．naturally | D．of course |
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 |