Getting your students ___ in classroom activities is vitally important.
| A．trapped | B．devoted | C．stuck | D．involved |
There being no witness on the spot, the police were delayed by the _____ of information about the crime.
| A．analysis | B．disappearance | C．absence | D．consideration |
______ a family of chimps wake up is our first activity of the day.
| A．Watch | B．Watching | C．Watched | D．Being watched |
These increased harvests _____ that 22% of the world’s people are fed from just 7% of the farmland in China.
| A．means | B．meant | C．mean | D．is meaning |
Some people have the idea_____ you can cross Canada in less than five days.
| A．what | B．that | C．which | D．when |
Only after her mother came to help her for the first few months ______ to begin her project.
| A．did she allow | B．had she allowed |
| C．was she allowed | D．is she allowed |