It is too early in the _____ to expect many visitors to the city.
| A．time | B．hour | C．season | D．term |
By the time Billy was 6, hein the sea.
| A．had already swum | B．was already swimming |
| C．has already swum | D．already swam |
It was only 3 hoursthe policeman caught the robber.
| A．before | B．since | C．when | D．that |
He is the very lecturer, experience impressed us greatly at the conference yesterday.
| A．who | B．whom | C．which | D．whose |
A terrible earthquake with tsunami happened in Japan,more than 10,000deaths.
| A．causing | B．to cause | C．caused | D．having caused |
Mum: Tom?
Tom: ? Here I am.
| A．What | B．OK | C．Yes? | D．All right |