These problems may lead to more serious ones, if unsolved.
| A．remained | B．keeping | C．left | D．making |
He doesn’t think the question of ________they are boys or girls is important.
| A．if | B．whether | C．which | D．that |
________to the victims of the earthquake, you can contact the local charity organizations.
| A．Contributing | B．To contribute |
| C．Being contribute | D．Contributed |
After suffering a heart attack, Michael Jackson was pronounced dead, ________a tragic end to the world’s most popular entertainer.
| A．marked | B．to mark | C．marking | D．having marked |
---I stayed at a hotel while in New York.
---Oh, did you? You ________ with Barbara.
| A．could have stayed | B．could stay |
| C．would stay | D．must have stayed |
The computers made by our company sell best, but several years ago no one could have imagined the role in the markets that they ________.
| A．were playing | B．were to play | C．had played | D．played |