Share Our World 6 Unit 7 Grammar 1
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Risks ___ (must/take) by explorers if they want to learn about our world.
must be taken
How can explorers find their way out of a cave? A rope ___ (can/use) to help them.
can be used
A volcano that has just erupted ___ (can/visit) right away. It's too dangerous.
can't be visited
Safety checks ___ (have to/do) before descdending into a cave.
have to be done
If you're careful, photos of animals in the jungle ___ (can/take)
can be taken
CORRECT ORDER - ascend-safety equipment-to-checked-we-before-has-be
Safety equipment has to be checked before we ascend.
CORRECT ORDER - be-headlamps-tunnels-worn-in-must-dark
Headlamps must be worn in dark tunnels.
CORRECT ORDER - the-river-why-be-the-by-explorers-crossed-can't
Why can't the river be crossed by the explorers?
CORRECT ORDER - feet-to-boots-worn-have-your-be-to-protect
Boots have to be worn to protect your feet.
Headlamps ___ (must/wear) in dark caves.
must be worn
Dangerous places ___ (must/enter) alone.
must not (mustn't) be entered
When a volcano starts to erupt, it ___ (can/stop).
cannot (can't) be stopped
To save lives, volcanic activity ___ (have to/study).
has to be studied
Special suits and gas masks ___ (have to/wear) to protect the scientists against heat and poisonous gases.
have to be worn
How ____ the problem ____? (can/solve)
can, be solved
A lot of questions ___ (must/answer) by the students.
must be answered
