Since time began, it seems, people have been putting off______they______have done today, scolding themselves in the meantime．
| A．that, must | B．that, should | C．what, could | D．what, would |
Nobody could believe what Chloe says because she is ___________ changing her mind.
| A．regularly | B．steadily | C．constantly | D．suddenly |
Would it be ___________ for you to pick me up at four o'clock and take me to the airport?
| A．free | B．vacant | C．handy | D．convenient |
Occasions are rare _____________ I can spend a whole day with my daughter.
| A．that | B．where | C．when | D．which |
A few days after the interview, I received a letter ___________ me admission to the university.
| A．offering | B．offered | C．having offered | D．to be offered |
Bats are surprisingly long-lived creatures, some ____________ a life span of around 20 years.
| A．having | B．had | C．have | D．to have |