单项选择题
Henry will not be able to attend the meeting tonight because （）
A. he must to teach a class B. he will be teaching a class C. he will teach a class D. he will have teaching a class
单项选择题 —Have you been paid for the painting —Yes, I remember（）$ 60 for it.
单项选择题 He () studied, yet he passed every exam.
单项选择题 —Have you seen Jack and John —I haven't seen ()of them.
