1. I do my homework ... carefully than you do

a) more

b) much

c) most

2. We visit our grandparents ... often than we did.

a) the least

often than we did..

b) little c) less

3. I study more ... when I'm not listening to music.

a) efficient b) efficiently

c) efficienter

4. Who goes to the gym the ... often?

a) more

b) most

c) very​