149. Do not start a book unless you can see from the first few pages that it is ______ you can easily read and understand.
The boy was not allowed ______ his brother’s bike.
He _____ tasted the mixture and give a smile.
None of the students watched the teacher______.
Miss Yang will teach us Chinese today ____ Mr Zhang.
Johnny, you ________ play with the knife, you ________ hurt yourself.