— Everyone must __________ the security check (安检) before getting on the plane at the airport.— Yes. It’s necessary to ensure the passengers’ safety.
It took us _______ to finish the new research project.
---Though Mike is _________ boy, he can say many words. ---How clever!
---How is this kind of hamburger? ---It tastes ______ and sells ______.
They go to school __________6:40 _________ Monday morning.
Please give ________ a glass of milk.