Study hard, relax well.

This bag is really ​ (a)   , I can hardly carry it.

• heavy
• heavier
• heavily

it usually rains ​ (a)   when there's a storm.

• heavily
• heavy
• serious
• hard

This is very fragile so please be ​ (a)   .

• careful
• carefully

Now cut the paper ​ (a)   so you don't damage it.

• carefully
• careful

He never laughs, he's a very ​ (a)   person.

• serious
• seriously

Please try to take this interview ​ (a)   , it's not funny.

• seriously
• serious

Don't drive so ​ (a)   , be more ​ (b)  

• fast
• patient
• patiently
• lastly
• fastly
• patience
• quick

I've been waiting ​ (a)   for 2 hours.

• patiently
• patient

This new car is extremely ​ (a)   .

• fast
• fastest
• faster
• quickly
• quicker

It was so dark I could ​ (a)   see but I tried really ​ (b)   to find the keys.

• hardly
• hard