Whether ways will be found to stop pollution or not is just _______ worries the public．
| A．why | B．which | C．that | D．what |
—I’d like to have one more look round. By myself this time.
—Of course. ________.
| A．Be my guest | B．Drop me a line |
| C．Count me out | D．Allow me |
Difficult as part of the passage was ________, I managed to catch hold of its meaning in the end.
| A．understanding | B．to be understood |
| C．to understand | D．being understood |
A competent teacher is perfectly aware that it’s not what is poured into a student that counts, but ________ is planted.
| A．what | B．that | C．why | D．how |
A great part of the information I have was ________ by looking up something and finding something else on the way.
| A．requested | B．acquired | C．exchanged | D．presented |
Your senses become alert and you suddenly find the answer to a problem ________ solution has long escaped you as a brilliant thought crosses your mind.
| A．which | B．that | C．whose | D．when |