—These Maths problems are too hard to ______. Can you help me? —There are many ways, but the most important is to try your best.
Although he is only a __________ boy, he knows a lot.
—Look! What a nice car! Whose car is this? —It __________ Mr. Liu, I saw him driving it yesterday.
If you have __________ where my lock might be, please tell me at once.
Some of the artist’s paintings are __________ in this exhibition in our City Museum.
Boys and girls, __________ you choose to wear, your clothes should be clean.