根据句意及汉语提示完成单词

①Many new (potato) will grow from one potato planted in the ground.

② Chocolate is usually the (child) favorite food.

③ Help (you), my children. The cake is delicious.

④ He is going to celebrate his (forty) birthday this Saturday.

⑤I like working here because everyone is (friend).

⑥The more we get together, the (happy) we will be.

⑦ No one taught him English. He learnt it by (he).

⑧ What a hot day! Look! Maria is (swim) in the river.

⑨Listen! They are singing (happy) in the classroom.

⑩ If the heavy rain (continue) to fall, the small village will be in danger.