If Jack doesn’t come home as usual, his parents will feel ________ about him

---I did really well in the examination, Li Ke.  ---I did _________. I got full mark. 

We can’t get the machine to run. There must be ______ with it.

We had estimated the number of visitors to our school’s hundredth anniversary at about 400, but the __________ number was much higher.

 Although the lady recovered from the illness ,she  is still _____with chopsticks.