1£®—David will win the first prize?
—Are you sure?
—________.He’s always working hard.
A£®It’s my guess¡¡¡¡¡¡¡¡¡¡¡¡¡¡ B£®It’s up to you
C£®That depends D£®It’s hard to say
2£®—Well£¬Jack£¬I’m sorry but I have to go home.
—________.I hope to hear from you soon.
A£®Enjoy yourself B£®Keep in touch
C£®Don’t be so sad D£®So am I
3£®As we all know£¬theory is based on practice and________serves practice.
A£®in nature B£®in return
C£®in turn D£®in fact
4£®Such habits as smoking and cheating£¬once________£¬are hard to get rid of.
A£®forms B£®forming
C£®having formed D£®formed