— David has made some mistakes in the test.
—________ , and ________ .

Generally speaking, when _____ according to the directions, the medicine has no side effect.

Only after a baby seal is pushed into the sea by its mother _______to swim.

Maybe you have been to many countries, but nowhere else _______ a more beautiful palace.

This problem may lead to more serious ones if_______ unsolved.

I can’t thank you _____ much for your kindness because without your help I wouldn’t have won the big prize in the speech contest.

_______ is even important is ______ as the earth cooled down, water began to appear on its surface.

Can it be in the drawer ________ you put your keys?

---What do you think of your parents?
---They always let me do ________ I think I should do.

“It isn’t the first time I ________ at home,” he said frankly.