To learn how their children are doing at school, parents need to _______ the teachers every now and then.
| A．admire | B．combine | C．gather | D．consult |
24. The valley was _____ in sunlight, and the children were singing and jumping with joy
| A．bathed | B．covered | C．swam | D．Surrounded |
23. Everyone should remember it is very important to _____ the balance of nature toady.
| A．get | B．make | C．keep | D．Remain |
22. She always ____ her opinion ____ facts.
| A．depends, on | B．bases, on | C．put, into | D．bases, by |
21. Every morning, the fish mongers stood there ______ with the fishermen for fishes.
| A．to argue | B．to talk about prices | C．bargaining | D．Discussing |
20. When Jack arrived, he learned Mary ____ for almost an hour.
| A．had gone | B．had set off | C．had left | D．had been away |