With more and more new drugs________,doctors don’t find it difficult to treat patients.
If you ______ your promise,the results will be sure to satisfy you.
Yassin's death was not ______ to stop Hamas' ability to ______ terror attack.
It is easier to make a plan than _____.
This is an order,you have no right to refuse it;just_________.
The officer made his men_________his order at once.