Ếch giun là đại diện của:
A.Bộ lưỡng cư không chân.
B.Bộ lưỡng cư có chân.
C.Bộ lưỡng cư có đuôi.
D.Bộ lưỡng cư không đuôi.

Choose the answer among A, B, C, D to complete each of the sentences below:
She showed her ________ by asking lots of trivial questions.
A.inexperienced
B.experience
C.experienced
D.inexperience

Choose the answer among A, B, C, D to complete each of the sentences below:
Their efforts were much ______ when they won 2 gold, medals in bodybuilding and billiards.
A.appreciated
B.considered
C.expended
D.required

Choose the answer among A, B, C, D to complete each of the sentences below:
He rose from his chair and ________ her warmly.
A.replaced
B.protected
C.appreciated
D.embraced

Choose the answer among A, B, C, D to complete each of the sentences below:
He has...... extensive research into renewable energy sources.
A.carried out
B.turned on
C.taken over
D.cared for

Choose the answer among A, B, C, D to complete each of the sentences below:
I am pleased to _______ the winner of the final competition. It's Group B
A.appoint
B.explain
C.recite
D.announce

Khi nói về đặc điểm chung của lớp lưỡng cư, phát biểu nào sau đây sai?
A.Là động vật biến nhiệt.
B.Phát triển qua biến thái.
C.Da trần ẩm ướt.
D.Thụ tinh trong.

Lưỡng cư có bao nhiêu vai trò dưới đây:
(1). Lưỡng cư có ích cho nông nghiệp.
(2). Lưỡng cư có giá trị thực phẩm.
(3). Làm vật thí nghiệm.
A.0.
B.2.
C.1.
D.3.

Choose the answer among A, B, C, D to complete each of the sentences below:
The Vietnam Society of Learning Promotion started a campaign ______ illiteracy eradication.
A.on
B.for
C.in
D.of

Choose the answer among A, B, C, D to complete each of the sentences below:
In spite of all its ______, medical science knows little about the brain.
A.advantages
B.approaches
C.advances
D.advents