It’s hard to believe____ the way out of the forest without the help of the local guide.
| A．what they were able to find | B．what were they able to find |
| C．how they were able to find | D．how were they able to find |
The boats take different routes, but they all____ in the same place.
| A．give up | B．clear up | C．end up | D．make up |
Of the two shirts, I’d like to choose the_____ one to save some money for a cap.
| A．cheapest | B．cheaper | C．more expensive | D．most expensive |
I will never forget the day____ we spent in the old town with small houses.
| A．who | B．whom | C．that | D．what |
In summer milk will quickly go bad_____ it is put into a fridge.
| A．though | B．unless | C．because | D．once |