complete com CAN, CAN'T, COULD OU COULDN'T:
a) i ______ sleep last Nigh. IT was so hot.
b) when i was 6,i ______ do a Handstand, but now i ______
C) there are só many different ice cream flavors to choose! i __________ decide.
d) she________ sing very well. she's an excellent singer.​