Standing on the top of the hill, one would not do anything, but _____ the flowing of the clouds around me.
| A．enjoy | B．enjoying | C．enjoyed | D．to enjoy |
The boy is only five years old, but he is quite used _____ the telephone.
| A．to answer | B．to answering | C．of answering | D．by answering |
--- What happened to your shoes?
--- They want _____。 .
| A．to mend | B．being mended | C．mending | D．mended |
It is generally considered unwise to give a child _____ he or she wants.
| A．however | B．whatever | C．whichever | D．whenever |
He insisted that he _____ from heart trouble, but I didn’t think so.
| A．should suffer | B．has suffered | C．suffers | D．was suffering |
The professor referred to _____ yesterday.
| A．come | B．came | C．coming | D．comes |