If our product ____ unsatisfactory within 7 days in any way, you can take it back.
| A．shows | B．proves | C．makes | D．performs |
Shy people often avoid situations _________ require close contact with other people.
| A．that | B．what | C．when | D．where |
A plan has been put forward_____more graduates should go to work in the country
| A．when | B．that | C．whether | D．how |
____some of the wine -- perhaps you will enjoy it.
| A．Trying | B．Try | C．To try | D．Have tried |
This book____a true story of how one person can make a difference in the lives of other people.
| A．will tell | B．has told | C．tells | D．told |
＿＿＿＿Sunday, the students are at home.
| A．Being | B．To be | C．It is | D．It being |