— How long have you known John?
— Since he ______ to our class.
| A．has come | B．came | C．had come | D．comes |
Please give me a call ______ you arrive in New York.
| A．swiftly | B．thoroughly |
| C．instantly | D．constantly |
I don't mind her criticizing me, but ______ is how she does it that I object to.
| A．it | B．that |
| C．this | D．which |
As a global financial center, Hong Kong serves as the ______ role in the course of Renminbi internationalization.
| A．unique | B．only |
| C．single | D．typical |
There is a ______ going on in America public schools over the best way to teach English to foreign students.
| A．decision | B．debate |
| C．quarrel | D．conclusion |
—Can I go out to play, Mom?
—You can ______ you stay in the garden.
| A．as if | B．as long as |
| C．now that | D．in order that |