10 questions on grammar and vocabulary from Units 3–4. Answer every question, then tap 'Check my score' at the bottom.
✏️ Language
Question 1
“You ___ smoke in the hospital — it’s forbidden.”
“Mustn’t” shows something is forbidden, not just a bad idea.
Question 2
“You ___ take painkillers if the pain is very mild — it’s not necessary.”
“Don’t have to” means something isn’t necessary, but it’s still allowed.
Question 3
“I ___ see the doctor tomorrow — I have an appointment.”
“Have to” fits a necessary, already-arranged appointment.
Question 4
“The doctor ___ want to run more tests — we’re not sure yet.”
“May” shows something possible but not certain.
Question 5
“She can ___ well.”
After a modal, the verb never takes -s.
Question 6
“This water is ___ polluted to drink.”
“Too” shows there’s a problem — the water can’t be drunk.
Question 7
“The car isn’t clean ___.”
“Enough” always comes after the adjective, not before it.
Question 8
“We don’t have ___ clean water.”
“Enough” comes before a noun.
Question 9
Cutting down large numbers of trees is called ___.
“Deforestation” means cutting down large numbers of trees.
Question 10
Energy that comes from natural sources and never runs out is called ___.
“Renewable energy” never runs out, unlike fossil fuels.
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