1£®This was the first time that I had_attended (attend)such an important meeting alone.

2£®Don't judge anything about the idea until you have understood it entirely (entire)£®

3£®Many parents find it helpful_to_have(have) pets in the house for their children.

4£®When he travels with his friends, his mother is always concerned (concern) about his safety.

5£®I'm tired of watching television; let's go for a walk.

6£®It took her a long time to recover from her heart operation.

7£®The poor girl has gone through such a lot since her parents died.

8£®Studies show that people are more likely to suffer from back problems if they sit before computer screens for long hours.

9£®I am really very grateful_to you for your warning.

10£®She said that he had_left(leave) for Shanghai the week before.