The toughest thing about success is ________ you have to keep on being a success.
| A．why | B．when | C．what | D．that |
It was only when I reread his poems recently__________ I began to appreciate their beauty.
| A．until | B．in which | C．that | D．so |
It was after he got what he had wanted he realized it was not so important.
| A．that | B．when | C．since | D．as |
There was time Iraq was one of the strongest countries in the world.
| A．a；when | B．a；that | C．the；that | D．the；when |
—My sister is very upset today.
—It’s your fault .You the bad news to her yesterday.
| A．should tell | B．should have told | C．shouldn’t have told | D．must tell |
After series of unsuccessful attempts, he has finally passed driving test.
| A．不填；the | B．a；the | C．the；a | D．不填；a |