Đáp án+giải thích:

$1.$ It is crucial for a helmet to be worn by people whenever doing any dangerous sport.

$2.$ It is useful for the passport number to be noted down on your phone, in case it is lost.

$3.$ It is inevitable for what happened to have been found out by us.

$4.$ It is so strange for the championship to have finally won by us.

$5.$ It's funny for yogurt to be eaten by cats.

$6.$ It is disturbing for noise to be heard from the outside by students.

$7.$ It is surprising for a gift to be received from my old friend by me.

$8.$ It is late for the form to be submitted at this time.

$9.$ It is happy for a lovely bouquet of flowers to be received by the girl from her boyfriend.

$10.$ It is easy for new languages to be learned by the smart boy.

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- câu bị động với chủ ngữ giả It :

 $+)$ dạng chủ động: $It + be + adj + for sb + to V + to do st$

 $+)$ dạng bị động:$ It + be + adj + for sth + to be V3/ed.$

#$Nan$