Прочитайте предложения (1-4) и вставьте в пропуски словосочетания (a-d)
a) attends b) went c) has been d) are helping
1. Three temporary employees __ out this month
2. Mister Brown never __ a meeting. He always sends me.
3. Sarah __ to the trade fair on Thursday.
4. Your advice _ always _ extremely helpful