Most environmental problems exist because adequate measures for preventing them ____in the past.
| A．not being taken | B．didn’t take |
| C．were not taken | D．haven’t taken |
Since Tom_____downloaded a virus into his computer, he can not open the file now.
| A．readily | B．horribly | C．accidentally | D．irregularly |
The melon the Smiths served at dinner would have tasted_____ if it had been put in the fridge for a little while.
| A．good | B．better | C．best | D．well |
There is an old proverb, “Love me, love my dog.” But there is _________ wisdom in this: “Love me, love my book.”
| A．some | B．much | C．more | D．most |
It is not socially ____ for parents to leave children unattended at that age.
| A．accessible | B．adorable | C．adaptable | D．acceptable |
Fitness is important in sport, but of at least ______ importance are skills.
| A．fair | B．reasonable | C．equal | D．proper |