Ten years ago the population of our village was that of theirs.
| A．as twice large as | B．twice as large as |
| C．twice as much as | D．as twice much as |
By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible．
| A．otherwise | B．yet | C．already | D．forever |
—What has made him upset recently?
—_______ alone to face a troublesome milk case．
| A．Left | B．Being left | C．Having left | D．To leave |
When he realized the police had spotted him, the man _______the exit as quickly as possible．
| A．made off | B．made for | C．made out | D．made up |
—Where is Tom?
—Well, he______ you_______ here．Otherwise he would come down right now．
| A．didn’t know；were | B．hasn’t known；are |
| C．doesn’t know；are | D．hadn’t known；were |
Our bad living habits will destroy the earth．Only by changing ______ we live can we save the earth．
| A．that | B．what | C．how | D．where |