---Is the new job a real challenge for him?
---Well, _______ difficulties he meets，I believe he will never lose heart.
| A．however | B．whenever | C．whatever | D．Whichever |
Mammals ________ nearly all warm-blooded animals except birds.
| A．settle in | B．settle down | C．take in | D．take up |
A study ______ that women find it more difficult to give up smoking than men.
| A．directs | B．indicates | C．influences | D．guides |
A wonderful idea ______ me that day when I met with a tough problem.
| A．happened to | B．occurred to | C．seemed to | D．compared to |
You’ve done so much work —you’re ____ pass the exam.
| A．addicted to | B．bound to | C．due to | D．accustomed to |
The retired teacher is in his mid-seventies —seventy-six to be _______.
| A．apparent | B．exact | C．approximate | D．similar |