He is only too ready to help others, seldom, ____, refusing them when they turn to him.
A．if never B．if ever C．if not D．if any
Encouraged by my science teacher, I set about my studies on developing my product, _____I hope I will succeed in applying for a patent（专利）.
A．with whom B．to whom C．through which D．for which
The main reason why Apple’s products always manage to capture the imagination of people worldwide is their attention to _____. Each and every part of an Apple product is perfect in its body.
A．details B．functions C．features D．trends
When a giraffe has _____ drink, it has to stand with its front legs wide apart in order to reach _____ water easily.
A．不填；不填 B．a; the C．the; 不填 D．不填；the
---We really enjoy ourselves at the party. Thanks again, Mr. and Mrs. White.
---_____. Just drop in whenever you feel like it.
A．Our great honor B．Nice having you here
C．Nice you are here D．With pleasure
—Bob! How’s your project? I heard you started it last Friday, right?
—Oh! I ______ for it. But I haven’t decided when to do it.
A．had prepared B．was preparing C．have been preparing D．have prepared
