He has ordered a watch on line for his father and it _______ to him before Father's Day.
A: send
B:will be sent
C:was sent
D: sent
①ω=3;②ω≠6k,k∈N*;③φ可能等于 34π ;④符合条件的ω有无数个,且均为整数.
其中所有正确的结论序号是____.
— Yes. But now I'm used to __________ in the swimming pool.