(2011·北京，31)The shocking news made me realize ________ terrible problems we would face.
A．what B．how C．that D．why
—What's the matter with Della?
—Well，her parents wouldn't allow her to go to the party，but she still ________.
A．hopes to B．hopes so
C．hopes not D．hopes for
________ a certain doubt among the people as to the practical value of the project.
A．It has B．They have
C．It remains D．There remains
It sounds like something is wrong with the car's engine.________，we'd better take it to the garage immediately.(2011·江苏，33)
A．Otherwise B．If not
C．But for that D．If so
________ a strange plant！I've never seen it before.(2011·辽宁，33)
A．Which B．What C．How D．Whether
—Why does the lake smell terrible?
—Because large quantities of water ________.
A．have polluted B．is being polluted
C．has been polluted D．have been polluted
