More money and effort should be spent to _______ the cultural relics in the world.
The book was written in 1946, the education system has witnessed great changes.
My wallet isn’t in my bag. Where I have put it?
Many children may be fond of animals, but ever think of making the study of animals their career.
The country has already sent up three unmanned spacecrafts, the most recent at the end of last March.
.______ the satellite launch drawing near, the research workers put their hearts to the test and always stayed up late.