1£®Because ________ the heavy fog, the flight was called off.

2£®Tom came up ________ a good idea that we would build a tree house.

3£®________ (actual) he pretended to be ill.

4£®________(base) on his own experience, he wrote a novel.

5£®________present, the farmers are getting in their crops.

6£®We should make good use________ this chance.

7£®He ________ (gradual) recovered from the injury.

8£®There come two boys. The former is Tom; the ________ (late) is Bill.

9£®How ________ (fluent) he speaks English!