Bats are surprisingly long-lived creatures, some ____________ a life span of around 20 years.
| A．having | B．had | C．have | D．to have |
China is a country with the largest population in the world, we all know it.
| A．and | B．which | C．that | D．as |
Mrs. White showed her students some old maps from the library
| A．to borrow | B．borrowed | C．to be borrowed | D．borrowing |
is hard is to do good all one’s life and never do anything bad.
| A．That | B．What | C．All | D．Which |
— Will you go out to play for a while, Kate?
—Not I finish all of my homework.
| A．when | B．if | C．after | D．unless |
The harder we study, the more questions we think of .
| A．asked | B．asking | C．to ask | D．ask |