The river, ____ are covered with trees, is very long.
| A．which banks | B．of which banks |
| C．whose the banks | D．the banks of which |
We _____ to move but are still considering where to go to.
| A．are deciding | B．decided |
| C．have decided | D．had decided |
You _____ your turn so you’ll have to wait.
| A．will miss | B．have missed |
| C．are missing | D．had missed |
I _____ for five minutes； why don’t they come？
| A．am calling | B．called |
| C．was calling | D．have been calling |
It’s good that we _____ to the park because it’s started to rain.
| A．don’t go | B．hadn’t gone |
| C．didn’t go | D．wasn’t going |
. Look at that little boy wandering about — perhaps he _____ his mother.
| A．will lose | B．is losing |
| C．had lost | D．has lost |