It will not be long _____man can harness the solar energy and make it serve mankind.
| A．since | B．before | C．when | D．after |
Our attitude toward our teachers should be _____, but not slavish or superstitious.
| A．respectable | B．respected | C．respective | D．respectful |
Her display of bad temper completely _____ the party.
| A．harmed | B．damaged | C．spoilt | D．hurt |
The _____ of the trees in the water was very clear.
| A．mirror | B．sight | C．reflection | D．shadow |
Roses are quite _____ flowers in English gardens.
| A．ordinary | B．common | C．usual | D．general |
The thief _____ the papers all over the room while he was searching.
| A．abandoned | B．vanished | C．scattered | D．deserted |