Bobby
throws
a banana skin
on the ground. He likes eating
bananas. Tina is very angry. She says, "Bobby, you can't
do that. Pick
it up
, please. It makes
the street messy
and dirty
."答案：throws, skin, eating, can't, Pick, up, makes, messy, dirty
1. Rubbish
2. There is rubbish on the ground. Please
3. To
4. My brother always
made
the river dirty
many years ago.2. There is rubbish on the ground. Please
pick
it up
and then put
it in
the bin.3. To
keep
our classroom clean
, we sweep the floor every day.4. My brother always
helps
me with
my English.答案：1. made, dirty 2. pick, up, put, in 3. keep, clean 4. helps, with
1. Sam slips on those
2. What can we do
3. We should
4. Some clothes
5. There
6. He helps
7. Bobby likes
banana skins
and falls
.2. What can we do
to help
him?3. We should
put
rubbish in the bins to keep
the park clean.4. Some clothes
make
the bed messy.5. There
is
rubbish in the street.6. He helps
(to) clean
the desks.7. Bobby likes
living
in the city.答案：1. banana skins, falls 2. to help 3. put, to keep 4. make 5. is 6. (to) clean 7. living
1. Black smoke from f
2. Mike went to the Palace M
3. Your i
4. The dirty water makes the fish d
5. To k
6. We can take the m
actories
makes the air dirty
.2. Mike went to the Palace M
useum
for the holiday.3. Your i
deas
are good.4. The dirty water makes the fish d
ead
.5. To k
eep
the classroom clean, we can sweep
the floor. We can't throw rubbish
on the floor
.6. We can take the m
etro
to school.答案：1. factories, dirty 2. Museum 3. ideas 4. dead 5. keep, sweep, rubbish, floor 6. metro