I.
1. My Tam, whom I often meet at the supermarket, is a famous singer.
2. How does Hoa usually go to work?
3. Tom isn't on the phone, which makes it difficult to contact him.
4. The cat is going to catch the rat.
5. She always plays tennis in the morning.
II.
1. Tom couldn't come to the party, which was a pity.
2. Quang Hai is a famous footballer who can play football very well.
3. I feel cold. I am going to be sick.
4. My sister usually goes to school by bike.
5. What do you study English for?