It ____ Jack twenty minutes ____ the math problem yesterday.
| A．took; to work out | B．takes; worked out |
| C．has taken; work out | D．is taking; working out |
People with learning disabilities can learn to drive, but it will take ________ effort.
| A．distant | B．extra |
| C．practical | D．patient |
Rose, don’t pick the flowers in the park, _______?
| A．don’t you | B．will you |
| C．do you | D．won’t you |
Every second counts in the exam, _________ means you must make the best use of the time available.
| A．who | B．that | C．which | D．What |
John isn’t here right now. He ______ Mr. Black’s office. Perhaps he______ in several minutes.
| A．is going to; has come | B．has been to; has come |
| C．has gone to; will come | D．went to; would come |
It is said that the second book __________ is written by the singer hasn’t come out yet.
| A．which | B．that | C．who | D．What |