Mr Li has some trouble sleeping, so dinking a glass of milk before going to bed every night is his common_____.
I had just settled in the new place and didn’t know ____________________.
In fact, I wonder _________ my efforts were all in vain.
Cloning plants is straightforward while cloning animals is _____________ more complicated.
The doctor recommended that you ____________ swim after eating a large meal.
Only a small percentage of the graduates ___________________ a job.