—I can hardly believe my eyes. Is that you, Lucy?—Yes. It has been almost 20 years ______ we were together.
If you don’t know the new words, you can look ______ in the dictionary.
______we take exercise, _____ we will be.
-Must I finish all the homework this evening?-No, you __________. Tomorrow is Saturday, and you have enough time for it.
We teenagers shouldn’t just ________ our looks.We should develop our abilities.
Now most families have only one child _____ our country’s one-child policy.