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【題目】At present, the number of people with COVID-19 in the USA _________ (increase) rapidly.

【題目】The secret of life is whenever an excellent chance _____________ (appear), take it.

【題目】The firemen _____________(control) the fire, so all of you are out of danger now.

【題目】The old man exercises every day __________(improve) his health.

【題目】What caused the infectious disease remains ____________ (know). We need to do more research on it.

【題目】__________ (silent) and a beach to walk on are all I need when I am sad.

【題目】Mike felt sleepy at the concert because he __________ (simple) has no interest in music.

【題目】I want to be one of the __________ (wealthy) men in the world when I grow up.

【題目】A big fire ______ in Australia and has caused a large number of deaths of animals.

【題目】— Who do you want to help you with the project, Lisa or Luna?