The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.
A．which B．that C．as D．what
It is required that each restaurant have signs on the walls,saying “ _____ your steps!”.
A．Watch B．Notice C．Mind D．Care
--- I think you should apologize to him.
--- _____. I’d apologize to anybody but him.
A．No way B．No problem C．No wonder D．No doubt
I want to go to college and become a doctor; _____ is my wish.
A．so B．such C．as D．what
People are living in_______ world where mouse clicks rule our life, so online searches have become_______ must.
A．the; / B．/; a C．a; a D．a; the
All those second-hand goods are sold at ____ before．
A．30％ as lower price as B．30％ as low a price as
C．as 30％ low price as D．30％ lower price than
