He must have passed this way, _____here are his footprints.
| A．since | B．because of | C．now that | D．for |
-----Have you _____ everything ready for the meeting?
----- Not yet, we need ______.
| A．got; another three chairs | B．got; more three chars |
| C．prepared; other three chairs | D．prepared; three another chairs |
It is he, not you, _____ right.
| A．who are | B．who is | C．which is | D．that are |
Those _____ know the answer put up your hands.
| A．who | B．which | C．that | D．whom |
It’s only ten minutes ______ the meeting but he’s still not here yet.
| A．for | B．at | C．by | D．till |
By the time he was twelve he ______ a chemistry lab of his own.
| A．built | B．has built | C．had built | D．was building |