It was playing computer games that cost the boy plenty of time that he _____have spent doing his lessons
| A．might | B．must | C．could | D．ought to |
We _______ not be embarrassed about our weight now.
| A．must | B．might |
| C．should | D．could |
I regret ______ those weight-loss pills, because I am now in hospital．
| A．to take | B．taking | C．taken | D．take |
Walking and riding your bike count, and ______ ．
| A．so school sports do | B．so do school sports |
| C．so school sports did | D．so did school sports |
Healthy eating along with regular exercise _______ important for your health．
| A．is | B．are | C．was | D．were |
Experts suggest that teenagers _____ at least 30 minutes exercising, five times a week.
| A．have spent | B．should spend |
| C．will spend | D．would spend |