Which of the following apps will you choose if you want to be a volunteer？（ ）
A．
B．
C．
D．
As soon as I heard the news that I passed the driving test，I felt at once．（ ）
A．angryB．relaxedC．afraidD．nervous
While traveling in a strange place，you'd better the local people and follow their customs （习俗）．（ ）
A．watchB．changeC．controlD．teach
Did you enjoy in Chengdu last week？
Yes，I had great fun there．（ ）
A．myselfB．yourselfC．ourselvesD．themselves
Sam is doing some about the ancient Silk Road．（ ）
A．exerciseB．operations
C．researchD．experiments
Our team lost the basketball game and I feel very sad．
______．I believe you can do better next time．（ ）
A．It's rightB．It's exciting
C．It's not a good ideaD．It's not a big deal