Scientists say it will be five or six years _____ it is possible to test this medicine on human patients.
| A．before | B．that | C．since | D．when |
The present that she dreamed ________ on her birthday party.
| A．came | B．of came | C．of coming | D．to come |
The police have ________anyone with information to come forward and talk to them.
| A．admitted to | B．appealed to | C．allowed for | D．called for |
I can’t find a proper dictionary _______ I can turn in my study.
| A．to which | B．up which | C．on which | D．for which |
Sit on the edge of _____ bed _____ minute before putting your feet on the floor.
| A．/；a | B．the；the | C．the；a | D．/；the |
The man preferred ______ in the room to read to ______out for a walk.
| A．staying, go | B．to go, going | C．staying, going | D．to stay, going |