5. I don't know what to_________at the university. I can't make any forecasts about my future.
| A．take in | B．take over | C．take off | D．take up |
By the time he was twelve he ______ a chemistry lab of his own.
| A．built | B．has built | C．had built | D．was building |
David jumped _____ to get the first ______ the beginning of the sports.
| A．enough high; in | B．enough highly; in |
| C．high enough; at | D．highly enough; at |
Who is the singer ______ you like best?
| A．that | B．who | C．whom | D．which |
Whose turn ___ the cleaning?
| A．is it doing | B．is it to do | C．is doing | D．is to do |
He ____ to lend me his bike but I refused, for I didn’t want to trouble him.
| A．failed | B．offered | C．considered | D．insisted |