When ______ with any difficulty, you should not give up easily.
Where are you working now?-In a big company. But I ___in a small workshop for 5 years in the countryside.
It is often said that ____teachers lead _______very busy life. A /, / B. /, a C. the, / D. the, a
—I’m going to play soccer now.—________. It’s raining heavily outside.
No one has yet succeeded in solving the _____ of how life first began.
Can you tell me ______?