Though it began to rain, they kept on _________ in the fields.
A. worked
B. to work
C. working
D. work
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They want to have us __________ in homes where "all appliances are connected to the Internet, sharing information."
A. lived
B. to live
C. live
D. to be living
To my surprise, the situation will develop in a direction ___________ to the enemy.
A. favorite
B. favorable
C. related
D. qulified
On hearing the news of _________ the examination, the boy was very happy.
A. his having passed
B. he pass
C. his being passed
D. to pass
The plate is empty. The birds __________ all the food.
A. must eat
B. have to eat
C. should have eaten
D. must have eaten