_____ prevent her from going to the party, he pretended to be ill ______.
It is a research group __________ 2 teachers and 8 students.
I can’t understand why he should tell a lie! He is my best friend! It doesn’t _____________.
If you _____________ your study, I am sure you will make greater progress.
_________ English can be difficult to learn, it is a very useful tool for communication.
Years of hard work almost made him ________________.