His success was because of ________ he had been working hard.

When will they _______ the bus stop — In half an hour.

Students are required to _______ down what the teachers teach in class. Which of the following is wrong?[ ]

II. Choose the correct answers after reading the passage.1.What did the group do first in the morning? They .

They__________on the program for almost one week before I joined them, and now we ________on it as no good results have come out so far.