These apples taste _____.
Every minute is made full use of ________ our lessons.
After the summer vacation, the professor, together with his fellow teachers, ______ the scientific experiment
I never doubt ________ he was dedicated to our firm.
—How many students passed the math test? — ________, for it was too much for them.
—what do you think of the matter? —Don’t you remember I have already ________ that it was troublesome?