— What’s the noise outside?
— Some children ________ hide-and-seek in the yard.
| A．were playing | B．are playing |
| C．have played | D．played |
My daughter often makes a schedule to get herself______of what she is to do in the day.
| A．remind | B．to remind |
| C．reminded | D．reminding |
There are so many books!It is not easy for us to decide what to take and what to______.
| A．take on | B．pick up |
| C．leave behind | D．work out |
A model or an experiment in a science class can help students see things which would ______ remain hidden.
| A．otherwise | B．still | C．thus | D．therefore |
How to balance the government's budget without raising taxes is a ______problem.
| A．firm | B．tough | C．secure | D．stable |
On your way to New York William will keep you ______if you don't want to be lonely.
| A．company | B．companion | C．safety | D．friend |