After driving for 20 miles，Jackson realized that he _______ in the wrong direction.
| A．was driving | B．drove | C．had been driving | D．had driven |
When the food in the hotel where we are staying , what should we do?
| A．isn’t tasted good | B．doesn’t taste good |
| C．isn’t tasted well | D．doesn’t taste well |
Since you understand all this, is no need for me to explain.
| A．it | B．this | C．that | D．there |
—Is there any vaccine(疫苗) against H1N1 flu that can be used on humans?
—No, but scientists are working to develop ________ .
| A．that | B．it | C．one | D．so |
Betty, still ______ excited, took away the box ______ with birthday presents for her.
| A．looked; filled | B．looked; filling | C．looking; filled | D．looking; filling |
--- I think it necessary that he _____ to New York but to London.
--- I agree, but the problem is _____ he has refused to.
| A．will not be sent; that | B．should not be sent; what |
| C．not be sent; that | D．should not send; what |