28. They ____ friends since they met in Shanghai ten years ago.
| A．have become | B．have turned | C．have been | D．have grown |
The young ________ the hope of our country.
| A．is | B．are | C．were | D．was |
Little ________ that we were watching his every move，so he seemed to be going his own way in this business.
| A．he realized | B．he didn't realize |
| C．didn't he realize | D．did he realize |
The singer and dancer ________ come to the party tonight.
| A．is to | B．are to |
| C．are going to | D．was to |
—Take this medicine three times a day，Tom!
—Do I have to take it？It ________ so terrible.
| A．is tasting | B．is tasted |
| C．tastes | D．has tasted |
It seems that water from this tap ________ for some time.We'll have to take it apart to put it right.
| A．had leaked | B．is leaking |
| C．leaked | D．has been leaking |