John hadn't been able to stop smoking suddenly; he had to control his smoking desire __________.
_______,when Marx was already _______,he found it was important to study the situation in Russia, so he began to learn Russian.
—We can not bring any snacks at the sports meeting. —_______.
It was _______ problem that _______ of the students could work it out.
Paul is really considering __ himself to __ those children in the earthquake-hit area.
I think the new film _______ by Mr. Zhang _______.