Bicycling is good exercise; ____, it does not pollute the air.
| A．nevertheless | B．besides | C．otherwise | D．therefore |
Jim took my book by mistake.He ought ___ the yellow one.
| A．to take | B．to have taken | C．take | D．have taken |
Jeanne said; “My friend, Mathilde, __ very hard during those years.”
| A．had worked | B．use to work | C．used to working | D．used to work |
I don’t go in for sports, but I enjoy ___ basketball matches.
| A．watch | B．watching | C．to watch | D．watching for |
Mr. Smith insists on doing some running even __ a cold morning.
| A．in | B．on | C．of | D．at |
I had hoped Mr.Blake ___ earlier than usual.
| A．came | B．to come | C．would come | D．was coming |