I’m planning to hold a party in the open air, but I can make no guarantees because it ________ the weather. [ ]

Did you see the film last night — No, I ______ some shopping at that time.

Amy was not sure _______________________.

, Chinese people celebrate the Mid-Autumn Festival by enjoying the full moon and eating mooncakes.

David had prepared carefully for the chemistry exam, as he wanted to be sure of passing it at the first _____.