. ---I must apologize for ___________ ahead of time. ---That’s all right.
| A．letting you not know | B．not letting you know |
| C．letting you know not | D．letting not you know |
The boy wanted to ride his bicycle in the street, but his mother told him ______.
| A．not to | B．not to do | C．not do it | D．do not do |
John wanted to ride his bike in the street but his uncle told him _____ .
A. not to B. not do B. not do it D. do not to
When _____ why he walked in _____ permission, he just _____ at us and said nothing.
| A．asked；without；stared | B．been asked；with；looked |
| C．asking；without；glared | D．to be asking；with；laughed |
He did all he could _____ .
| A．help me out | B．to help out me | C．help me out of | D．to help me out |
_____ Monday morning he wrote an article on grammar.
_____ Monday morning he had written an article on grammar.
| A．By | B．On | C．At | D．／ |