Never before _____in greater need of modern public transport than it is today.

 Not only _______interested in Beijing Opera but ______beginning to show an interest in it.

— 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.

 If the weather is fine, we’ll go. If ______, ______.

Only by practising a few hours every day ________ be able to play the piano well.

Though ______in a big city, Peter always prefers to paint the beautiful scenes of country     life.

The man kept silent in the room unless _______.

Though ________ money, his parents managed to send him to school.

 He doesn’t have money now.  ____, he would lend it to you. 

Among the children ______ the professor telling stories.

    —I want to get a license. What do you think I should do? —Only with enough practice ______ the driving test, I think.

 Not only ______  strict with us, but also ______  for us .

No sooner _______ the competition _______ _______ an unexpected accident happened.

 Not until he took off his sunglasses _______ him.

_______ are the days when girls were looked down upon.

_______ about wild plants that they decided to make a trip to Madagascar for further research.