Điền vào chỗ trống sau một động từ thích hợp 1. No smoking or drinking ___________ allowed during work time. 2. Indians ____________ a lot of junk food. 3. More than one student _________ late for class this morning. 4. The United Nations _________ found in 1945. 5. A number of the boys __________ swimming in the lake, but I didn't know the exact number of them. 6. One and a half day _______ what I need. 7. There _________ still the possibility of heavy rain and high winds. 8. Politics _________ a constant source of interest to me. 9. The pilot as well as all the passengers ________ rescued from the crash. 10. Half of the cookies ________ been eaten.