It’s so convenient to use cell phones to pay the subway fare.—Yes. _________ thought of the idea is really brilliant.

ather in Inner Mongolia is always dry, butsometimes it _____ rain heavily.

________, I have never seen anyone who is as capable as David. [ ]

Eliza remembers everything exactly as if it ________ yesterday.[ ]

This is a very interesting book with lots of new words. Please ______ it carefully.