________ is often the case with children，Amy was better by the time the doctor arrived.
| A．It | B．That | C．What | D．As |
At the present time, more singing stars_______ to be difficult to work with.
| A．say | B．have said | C．are said | D．were said |
— These grapes look really beautiful.
— They _______! See the price $3.99 a pound. Very expensive, aren’t they!
| A．would | B．could | C．might | D．should |
The boy was so tired that he fell asleep _______ his mother could take off his clothes.
| A．before | B．after | C．while | D．when |
Peter sat on the train seat, with his eyes ____ on the fields outside the window.
| A．fixing | B．fixed | C．to fix | D．having fixed |
Everyone was out of _____ breath after they ran for so long _____ time.
| A．不填; 不填 | B．不填; the | C．a; the | D．不填; a |