_____ we were worried about was _______ they could manage to control the pollution.
| A．That; how | B．That; whether |
| C．What; that | D．What; whether |
We should make a careful study of his____.
| A．useful teaching experiences | B．useful teaching experience |
| C．usefully teaching experiences | D．usefully teaching experience |
___ to play with the kids!
| A．What a fun it is | B．What fun it is | C．How fun it is | D．How fun is it |
___ we are having today!
| A．What pleasant weather | B．What a pleasant weather |
| C．What pleasant whether | D．What a pleasant whether |
____the sketch of Xiao Shenyang made a _____has been known to us all.
| A．That; hit | B．What; strike | C．Why; beat | D．which; knock |
That Xiao Shenyang was elected _____model worker of May Day caused ____enthusiastic discussion in China.
| A．the; the | B．a; an | C．the; a | D．a; the |