When she heard her son had been admitted to a key university，words couldn't ________ her excitement.
A：convey
B：explain
C：conduct
D：distinguish
将下列问句答句连线。
①What's this?____ A. Yes, I do.
②Is this a bear? ____ B. It's a bee.
③What do you see?____ C. No, it isn't.
④Do you see a monkey?____ D. I see a frog.
经过任意三点中的两点共可以画出的直线条数是____ 条．
