________one scientist has pointed out, children’s skulls are not fully developed.
| A．That | B．As | C．Which | D．What |
-----Do you have a minute? I’ve got something to tell you.
-----Ok, ______ you make it short.
| A．now that | B．if only | C．so long as | D．every time |
_______ in the fields on a March afternoon, he could feel the warmth of spring.
| A．To walk. | B．Walking | C．Walked | D．Having walked |
Students are always interested in finding out _______ they can go with a new teacher.
| A．how far | B．how soon | C．how often | D．how long |
----Are you happy with your new computer?
----- No, it is _______ me a lot of trouble.
| A．showing | B．leaving | C．giving | D．sparing |
---- Hi, Mark. How was the musical evening?
----- Excellent! Ales and Andy performed _________ and they won the firs prize.
| A．skillfully | B．commonly | C．willingly | D．nervously |