Это два модальных глагола, которые выражают разрешение. Can используют в неформальной обстановке, а may берут, когда нужно быть вежливее.
May I come in?
Can I ask you a question?
1) was
2) came
3) gave
4) talked
5) spent
6) explored
7) know
8) was
9) got
10) was
11) read
12) gave
13) looked
14) saw
15) admired
16) decided
17) became
18) went
19) left
20) took
21) spent
22) explored
23) was
24) was
25) will go
26) will start
27) will arrive
28) will go
29) will take
30) discover
31) will be
3)
1of
2along
3of
4on
5about
6in
7at
1
1sunny
2cloudy
3stormy
4rainy
5??
2.1Christmas is in winter.
2The N.H.C.is in summer
3Easter is in spring
4T.is in autumn
5I.d is in summer
3
1islands
2Sea
3ocean
4volcanoes
5forests
4
1how big
2how high
3how many
4how warm
5how long
5
1what are you going to do in August?
2I am going to visit a friend in G.?
3We aren't going to go abroad.
4My cousin is going to travel to Mexico.
5Where is she going to stay?
6She isn't going to speak E.
6
1you must buy a ticket
2you must have a shower
3you must wear a swimming hat
4you mustn't run
5you mustn't bring glass bottles
6you mustn't dive
7
1do you live
2help
3high
4mountain
5have you got
6didn't bring
7It's
8must
9quickly
10going to rain
в 1 про красный флажок не знаю.в учебнике должно быть.поищи