---Why didn’t the little boy raise his hand in class today ?
---- Maybe the questions are ______ difficult for him_______ answer .
| A．too, to | B．enough ,to |
| C．not ,to | D． so ,that |
Lilei was late for class yesterday ________ the heavy traffic.
A. because of B. because C. so
I will tell you if he ______ to Beijing tomorrow.
A. come B. comes C. will come
—What will your parents do?
—They will go on a ______ visit to Beijing.
A. seven day B. seven-day C. seven-days
Taiwan is ______ the southeast of China and ______the northeast of Hong Kong.
A. in ; onB. in ; toC. to ; on
Your group’s task is _______ the cost to go there by plane.
A. findB. found C. to find out