We were swimming in the lake ______ suddenly the storm started.
A.until | B.while | C.when | D.before |
. Jack almost fell off the cliff, but managed to _____ until help came.
A.keep on | B.catch on | C.count on | D.hang on |
The storm sweeping over this area now is sure to cause _____ of vegetables in the coming days.
A.rarity | B.scarcity | C.invalidity | D.variety |
. Don't _____ the news to the public until we give you the go-ahead (许可,准许).
A.release | B.discard | C.relieve | D.retain |
If you _____ your demand, then maybe you will have more chance of getting what you want.
A.conduct | B.dismiss | C.grant | D.moderate |
. His _____of the aeroplane was correct in every detail and could really fly.
A.shape | B.pattern | C.design | D.model |