The physics teacher told the students to observe carefully what would happen when a (n) _____ acted on the object.
.Americans eat______ vegetables per person today as they did in 1990.
Anyone who always______ a difficult situation can’t become a successful man.
Low-carbon lifestyle is of great benefit to improve the world environment.________can be enjoyed from it until you have a deep understanding of it,however.
The scientist was rewarded by the government for________such a great,contribution to the country.
Too high house prices can be brought under control,________ the authorities introduce a series of regulatory policies.