—We were surprised to hear that the reason ________ she gave for her absence was ________ her mother was ill.—Yes.We saw her mother was at the supermarket that morning.
We ________ the project on time without your timely help .
You________ the work better, but you didn’t put more efforts to it.
The professor you referred to in the letter______ us students three lectures by next Monday.
—What do you think has caused his heart attack? —It is ______.
—Do you have any idea why the engineer resigned?—No. In fact, everyone is ____about it.