It is uncertain ______ side effect the medicine will bring about, although about two thousand patients have taken it.
| A．what | B．that | C．how | D．whether |
___________, I have to put it away and focus my attention on study this week.
| A．However the story is amusing | B．No matter amusing the story is |
| C．However amusing the story is | D．No matter how the story is amusing |
We have made ________ a rule________ in the office.
| A．this; not to smoke | B．it; smoking |
| C．it; not to smoke | D．it; to not smoke |
With a lot of difficult problems _________, the newly-elected president is having a hard time.
| A．settled | B．settling | C．to settle | D．being settled |
I still remember _______ to the Tian’anmen Square and what I saw there.
| A．to take | B．to be take | C．taking | D．being taken |
More highways have been built in China,________ it much easier for people to travel from one place to another.
| A．making | B．made | C．to make | D．having made |