24.The first time I met David in the Central Park, both of us felt that we_____each other for ages.
Willie's wife never gives him pocket money until he __________ clearly how he will spend it.
Can you explain __________ the sun goes down in the west?
What an unforgettable experience ! I'll write it down __________ it is still fresh in my memory.
__________,many people go in for them and benefit from them.
Although __________ to be the best in a recent science competition, the students remain hard-working.