If we ________ enough preparations, the conference wouldn’t have been so successful.
A. haven’t madeB. wouldn’t make
C. didn’t makeD. hadn’t made
Sichuan is home to giant pandas, ________ are China’s national treasure loved by people all over the world.
A. whoseB. thatC. whereD. which
It was along the Mississippi River ________ Mark Twain spent much of his childhood.
A. howB. whichC. thatD. where
________ matters most in learning English is enough practice.
A. WhatB. WhyC. WhereD. Which
You ________ be tired—you’ve only been working for an hour.
A. must not B. won’tC. can’tD. may not
More than a dozen students in that school ________ abroad to study medicine last year.
A. sentB. were sentC. had sentD. had been sent
