A model or an experiment in a science class can help students see things which would ______ remain hidden.
| A．otherwise | B．still |
| C．thus | D．therefore |
一I apologize for having made a mess in your bathroom．。
一_______. After all，you didn’t mean it．
| A．You’re welcome | B．It’s my pleasure |
| C．Don’t mention it | D．I can’t agree more |
Surely the day you are informed of your being admitted to a famous key university will be ________ of joy and celebration for your family, relatives and friends.
| A．that | B．the one | C．one | D．those |
It is said that the software on learning subjects for pupils in a very practical way.
| A．designed | B．designing | C．are designed | D．is designed |
One day, news came ____ Britain’s old king had died without a son.
| A．what | B．that | C．which | D．how |
When we climbed up to the top of the mountain, we were all ___________.
| A．out of the breath | B．short of the breath |
| C．out of breath | D．short of breaths |